Many children who are enrolled in special speech and language treatment programs in lower elementary school

"Have a history of middle ear infection".

A middle ear infection, which is also known as otitis media happens when viral something or bacterial infection inflames the area behind eardrum. This often happens to kids.

Most autism behavioral intensive therapy programs incorporate speech-language treatment. With an assortment of procedures, speech-language therapy tends to a scope of difficulties frequently looked by children with autism. For example, a few people on the autism spectrum don't talk, while others want to talk however experience issues utilizing conversational discourse or potentially understanding the subtleties of dialect and nonverbal signals when chatting with others.   

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.